public void ConvertISBN10ToISBN13()
{
const string validISBN10 = "147670869X";
const string validISBN13 = "9781476708690";
var converter = new ISBNConverter(validISBN10);
Assert.True(converter.IsValid());
Assert.Null(converter.ErrorMessage);
Assert.Equal(validISBN13, converter.ISBN13);
}
public void InvalidLengthInput()
{
const string invalidISBN10 = "47670869X";
const string invalidISBN13 = "978476708690";
var converter1 = new ISBNConverter(invalidISBN10);
var converter2 = new ISBNConverter(invalidISBN13);
Assert.False(converter1.IsValid());
Assert.False(converter2.IsValid());
Assert.NotNull(converter1.ErrorMessage);
Assert.NotNull(converter2.ErrorMessage);
Assert.NotEqual(invalidISBN10, converter1.ISBN10);
Assert.NotEqual(invalidISBN13, converter1.ISBN13);
}
